The Screw,assembled Washer, cataloged under National Stock Number 5305-01-471-0249, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-471-0249 |
| Item Name | Screw,assembled Washer |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN |
| Fastener Length | 0.343 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Secondary Washer Relationship to Primary Washer | NOT IDENTICAL |
| Primary Washer Outside Diameter | 0.212 INCHES MAXIMUM IN |
| Thread Length | 0.252 INCHES MINIMUM AND 0.284 INCHES MAXIMUM IN |
| Secondary Washer Style | FLAT |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | MODIFIED PAN |
| Primary Washer Style | SPLIT HELICAL RING |
| Thread Direction | RIGHT-HAND |
| Primary Washer Material Thickness | 0.025 INCHES NOMINAL IN |
| Secondary Washer Outside Diameter | 0.213 INCHES MINIMUM AND 0.223 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Secondary Washer Material Thickness | 0.017 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN |
| Thread Quantity Per Inch | 40 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Washer Quantity | 2 |
| Head Diameter | 0.205 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 03-P07961V | D/9 Drawing number reference only U.S. Government activity |
| 03-P07961V005 | 3/9 Design control — primary reference U.S. Government activity |
| 03-P07961V005 | 5/9 Secondary reference General Dynamics Mission Systems, Inc. Dba Gdms |
NSN 5305-01-471-0249 is a Screw,assembled Washer, classified under FSC 5305, Screws. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5305-01-471-0250, 5305-01-471-0357. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-01-471-0249: Head Height: 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN; Fastener Length: 0.343 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Secondary Washer Relationship to Primary Washer: NOT IDENTICAL; Primary Washer Outside Diameter: 0.212 INCHES MAXIMUM IN. 21 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.